Trevor Bayne still hospitalized

RICHMOND, Va. -- Daytona 500 winner Trevor Bayne no longer believes an insect bite is behind the symptoms that have landed him in the hospital.

"Still at the hospital!" Bayne posted on Twitter on Saturday night. "Don't think its related to the bite ... But we'll see!"

Roush Fenway Racing announced Thursday that Bayne had been hospitalized to be tested for symptoms that were believed to be from an insect bite in early April. Team owner Jack Roush told the Motor Racing Network that Bayne has been hospitalized at the Mayo Clinic.

The team has released very few details about the 20-year-old, and has not said how long he's been hospitalized.

Bayne was treated after the April 9 race at Texas after experiencing numbness in his arm while driving. It was believed to be related to a bite he'd received days earlier on his left elbow.